system for sensing the motion or pressure of a fluid
First Claim
1. A system for sensing the motion of a fluid, the system comprising:
- a body having an internal flow passage;
an electronic sensor located within said flow passage; and
a metal lead frame, said lead frame in electrical communication with said sensor, said lead frame integrally molded with said body.
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Accused Products
Abstract
A system for sensing or measuring the motion of a fluid such as air. The system typically has a two-part plastic body containing an internal flow passage. The parts of the body may snap together or attach with an adhesive. A transducer or an electronic sensor is typically located within the flow passage, which may measure mass flow rate and may have two resistive thermal devices (RTDs) located on either side of a heat source. The body may have two elongated port tubes configured to attach to tubing. The port tubes may contain venturis, and may be substantially straight and substantially parallel, forming a U shape. A metal lead frame may be provided in electrical communication with the sensor. The lead frame may be integrally molded within the body, and may have a lower coefficient of thermal expansion than the body. The internal flow passage and the sensor may be substantially symmetrical and measure the flow rate of the fluid substantially equally in either flow direction. The system may be configured for surface mounting or for through-hole mounting, and may be a dual in-line type.
66 Citations
41 Claims
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1. A system for sensing the motion of a fluid, the system comprising:
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a body having an internal flow passage;
an electronic sensor located within said flow passage; and
a metal lead frame, said lead frame in electrical communication with said sensor, said lead frame integrally molded with said body. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31)
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32. A system for sensing the pressure or flow rate of a fluid, the system comprising:
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a body having an internal flow passage, said body comprising a first part and a second part, said first part and said second part being joined by a joint;
said joint comprising an elastomeric seal, said elastomeric seal being integral with said first part; and
a transducer located within said flow passage. - View Dependent Claims (33, 34, 35, 36, 37, 38, 40, 41)
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39. A system for measuring the flow rate of a gas, the system comprising:
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a body having an internal flow passage, said body comprising a first part and a second part, said first part and said second part being joined by a joint;
said first part and said second part being configured to snap together; and
a sensor located within said flow passage.
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Specification